"All of the Above"

Just curious ... if the student is allowed to select all of the answers at once, why even have an "All of the above" choice? Seems illogical. I would think "All of the above" only applies to questions that allow a single choice only.Just curious ... if the student is allowed to select all of the answers at once, why even have an "All of the above" choice? Seems illogical. I would think "All of the above" only applies to questions that allow a single choice only.

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